package com.itheima.reggie.controller;


import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.common.R;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.entity.ShoppingCart;
import com.itheima.reggie.service.ShoppingCartService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.time.LocalDateTime;
import java.util.List;

/**
 * 购物车
 */
@Slf4j
@RestController
@RequestMapping("/shoppingCart")
public class ShoppingCartController {
    @Autowired
    private ShoppingCartService shoppingCartService;

    @GetMapping("/list")
    public R<List<ShoppingCart>> list(){
        LambdaQueryWrapper<ShoppingCart> lqw = new LambdaQueryWrapper<>();
        lqw.eq(ShoppingCart::getUserId, BaseContext.getCurrentId());
        lqw.orderByAsc(ShoppingCart::getCreateTime);

        List<ShoppingCart> list = shoppingCartService.list(lqw);

        return R.success(list);
    }

    @PostMapping("/add")
    public R<ShoppingCart> add(@RequestBody ShoppingCart shoppingCart){
        log.info("购物车数据:{}",shoppingCart);

        //设置用户id，指定当前是哪个用户的购物车数据
        Long currentId = BaseContext.getCurrentId();
        shoppingCart.setUserId(currentId);

        Long dishId = shoppingCart.getDishId();

        LambdaQueryWrapper<ShoppingCart> lqw = new LambdaQueryWrapper<>();
        lqw.eq(ShoppingCart::getUserId,currentId);

        if (dishId != null){
            lqw.eq(ShoppingCart::getDishId,dishId);
        }else{
            lqw.eq(ShoppingCart::getSetmealId,shoppingCart.getSetmealId());
        }
        ShoppingCart cartServiceOne = shoppingCartService.getOne(lqw);
        if (cartServiceOne != null){
            Integer number = cartServiceOne.getNumber();
            cartServiceOne.setNumber(number+1);
            shoppingCartService.updateById(cartServiceOne);
        }else{
            shoppingCart.setNumber(1);
            shoppingCart.setCreateTime(LocalDateTime.now());
            shoppingCartService.save(shoppingCart);
            cartServiceOne = shoppingCart;
        }
        return R.success(cartServiceOne);
    }


    @DeleteMapping("/clean")
    public R<String> clean(){
        LambdaQueryWrapper<ShoppingCart> lqw = new LambdaQueryWrapper<>();
        lqw.eq(ShoppingCart::getUserId,BaseContext.getCurrentId());
        shoppingCartService.remove(lqw);

        return R.success("清空购物车成功");

    }

    @PostMapping("sub")
    public R<ShoppingCart> sub(@RequestBody ShoppingCart shoppingCart) {
        Long currentId = BaseContext.getCurrentId();
        shoppingCart.setUserId(currentId);

        Long dishId = shoppingCart.getDishId();
        LambdaQueryWrapper<ShoppingCart> lqw = new LambdaQueryWrapper<>();

        lqw.eq(ShoppingCart::getUserId, currentId);

        if (dishId != null) {
            lqw.eq(ShoppingCart::getDishId, dishId);
        } else {
            lqw.eq(ShoppingCart::getSetmealId, shoppingCart.getSetmealId());
        }
        ShoppingCart cartServiceOne = shoppingCartService.getOne(lqw);

        Integer number = cartServiceOne.getNumber();
        if (number > 1) {
            cartServiceOne.setNumber(number - 1);
            shoppingCartService.updateById(cartServiceOne);
        } else {
            cartServiceOne.setNumber(0);
            shoppingCartService.remove(lqw);
        }
        return R.success(cartServiceOne);
    }
}
